REVISION CH (1,2)
Q1: Speed of car 7 mm/µs is equal in m/s
Q2:electronic door opens for 3600µs express this time in :
1- hours
2- minutes
3- mille minutes
Q3:asquare of edge 20 mm find its area in SI units
Q4:The density of mercury 13.6g/m3 what is the density of mercury in
MKS system ?
Q5:How many millimeters in kilometer?
Q6: using the dimensional analysis check the validity of the equation
1/t=x/at3
Where t is time ,x distance ,a acceleration
Q7:How many significant figure in each of the following numbers?
a- 0.04
b- 10.0001
c- 0.000025
d- 700
e-300×108
f-2.1+1.10042